Jane2

Hi everyone...new member here. Just spent all my money to by a 2004 C240 4 Matic from a guy who seemed trust worthy! Afterwards I smelled gas on day 1. I brought it to a Mercedes dealer and they said it was the sending unit. They wanted $1700 to fix!! Don't have it so this girl is going to attempt changing it herself! I bought the unit and it will be here Wednesday. Can anyone tell me where it is located? I saw a video that said it was behind the back seat...? Is that true? Thanks! Any help with this adventure would be appreciated! Tutorial?

MJ50

moved to W203 forum...
on W211, it's under the rear seats... so i assume it's similar for W203...

insame1

I looked it up and it is the in tank unit. The w211 pump is the same setup and there are tones of threads about changing it since it was a faulty part from the factory. Unfortunately our cars were not covered in the recall. I just did this on mine so if you get stuck let us know.

Jane2

I did a search but don't see anything? Because I'm new to this...someone suggested a forum W211 but when I clicked on it...it was advertisements from Amazon? Can someone send me a tutorial or direct me in a more specific way please? Thanks!

RedGray

Near the top of the forum page, click on Search
https://mbworld.org/forums/search.php

Then, on the search page..

1. In the field
   Search by Keyword
   Keyword(s)
   .
   .
   
2. Type
   fuel pump
   .
   .
3. In the field: Search in Forum(s)
   Scroll down and chose: C-Class (W203)
   .
   .
   
4. Click on the button labeled:
   Search Now

.
.
You should get results similar to the following search link:
https://mbworld.org/forums/search.php?searchid=18347202

.

RedGray

Here's a thread that has good info and attachments:
https://mbworld.org/forums/c-class-w...-tank-now.html


Here's a link to a youtube search:
https://www.youtube.com/results?sear...w203+fuel+pump

Russell Ormerod

Here's a good tip.. don't buy a Mercedes with the last of your money!

craiger13

Hey guys I am asking for a friend he has a c230 sport he is losing power and his engine light comes one he also experiences problems like high revs like something is wrong with the trans etc, he said that this happened before but they charged him 1700 dollars for his cam shaft I read somewhere that it could be a vacuum hose thing any ideas??

evannguyen

Invest in a code reader unit first to figure out what is wrong.

RedGray

You've been on the forums for a while, and have had an MB for a while.
Yet, you didn't give critical important information.
???

What year is the car?
What engine is in the car?
What country is the car in/from?

The M271 4-cylinder has a problem with the "$17 hose" under the intake.
Actually, all of those hoses should be changed.
For a DYI, also use thermo-shield on the hoses. Imho, the dealerships should do that also.

Fwiw, hoses deteriorating from heat is common in "older" cars (10+ years).
Often, it's from the lack of proper heat shielding from the factory - to save money.